Pneumatic wrench for applying and removing flush caps for flexible stays.



- C. P. WHELMM.

PNEUMATIC WRENCH FOR APPLYING AND REMOVING FLUSH CAPS FOR FLEXIBLE STAYS.

APPLICATION FILED AUGJ. I915 L1H%fifi1 Patented D045. 141, 1915.

CHARLES P. WHELAN, 01F SYRACUSE, NEW YORK.

PNEUMATIC WRENCH FOR FLYING AND REMOVING FLUSH CAPS FOR FLEXIBLE incisor.

To all whom it may concern I a citizen of the United States, and resident of Syracuse, in the county of Onondaga, in the State of New York, have invented new and useful Improvements in Pneumatic Wrenches for Applyin and oRemoving Flush Caps for Flexible tays, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

' This invention relates to an improved device for removing flush stay-bolt caps, such as are generally used in connection with flexible stay-bolts for boilers and similar apparatus, in which the outer faces of the caps are flush with the outer face of the boiler. These caps are screwed into bushings which in turn are screwed into threaded apertures in the boiler shell, and are provided with spherical sockets for receiving .the heads of the spherical bolts, and inasmuch as it is necessary, particularly in locomotive boilers, to inspect these connections at more or less regular intervals, it becomes neces sary to remove the caps. It is well known, however, that after a short period of use the caps become rusted in or otherwise set to such an extent as to render the removal extremely diflicult, and the primary object of my invention is to provide simple means for removing the caps with greater ease and with less liability of injury to the caps or bushings than has heretofore been practised.

Other objects and uses relating to specific parts of the device will be brought out in the following description.

In the drawings--Figure 1 is a longitudinal sectional View, partly in elevation,

of my improved cap removing device, together with a flexible stay-bolt and adjacent portion of aboiler in which it is used. Fig.-

2 is a perspective view of the detached wrench and anvil shown in Fig. 1. Figs. 3 and 4 are perspective views of slightly modified forms of the wrench and anvil.

The device forming the subject matter of my invention comprises a cylindrical head -1 and a pneumatic hammer 2 cooperating therewith, the head -1 being provided with an elongated cylindrical shank 3 of less diameter than the head and adapted to fit easily in the socket, as

4, of the pneumatic hammer --2-- so STAYS.

Specification of Letters Patent.

. Application filed August 7, 1915. Seria1No.44,316.

that the end of the shank 3 may constitute an anvil -5- for engagement by the reciprocatory striker, as -6-, of the hammer. The opposite end of the head -l is provided with suitable means, as round bosses 7*., arranged in spaced relation for engagement in corresponding sockets 8- of the cap -9 which is to be removed, or re1nserted, from the bushings as 10, said bushing being provided with the usual spherical socket for receiving the spherical head of stay-bolt 1l, whereby the inner and outer walls, as 12 and 13, of the water leg of a boiler or other apparatus may be held in fixed relation. The object of the interlocking connections between the head 1 and cap -9 is to permlt the cap to be removed by turning the head, and for. this purpose the head is provided with one or more diametrically extending openings 14 for the reception of a handle-bar -15, but by which the head may be rotated to loosen or tighten the cap. These heads will be made in standard sizes, corresponding to the size of the caps to which they are applied, and are usually of slightly less diameter than said caps so that they may enter the threaded sockets in the adjacent ends of the bushings -10 if necessary. It is evident, however, that other forms of interlocking connections may be used between the head and cap, such, for example, asproviding the cap with bosses similar to the parts 7 of the head, in which case the head would be provided with corresponding sockets, as 7, or it may be provided with a single angular or square boss, as.8, shown in Fig. 4, to

enter a corresponding socket in the cap, the

cap shall have male and female connections whereby the cap may be turned by the rotation of the head.

The shank -3 is adapted to fit into the socket of the hammer in such manner that its inner end may constitute an anvil lying close to the striker as -6, so that when it is desired to loosen the cap the pneumatic hammer is set in motion to operate the striker +6- against the anvil 5, thereby transmitting intermittent endwise blows to the cap 8+ at the same time that the operator is applying force to the handlebar 15 to turn the head for unscrewing the cap, the two operations being simul-- taneous and, therefore, more effective than either operation separately. It has been found after repeated experiments that these combined operations are efficient in quickly loosening the cap Without in any Way overstraining or injuring either the cap or bushing, and allows the joint to be expeditiously inspected for leaks or loosening whenever necessary.

What I claim is:-

In a device ofthe character described, the combination of a. pneumatic hammer having a socket in one end and a striker at the base of thesocket, a cylindrical head having one end provided with a reduced cylindrical shank loosely fitted in said socket to turn therein relatively to the hammer and having its inner end in striking coaction with the striker of the hammer, said head having its opposite end provided with means 20 for engaging and turning the cap and its intermediate portion provided with a diametrical opening and a handle-bar inserted in said opening for turning the head relatively to the hammer and while the hammer 25 H. E. CHASE, M. VIOLA HOWLAND. 

